/*
 *
 * Copyright 2002-2004 The Ant-Contrib project
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package net.sf.antcontrib.cpptasks.borland;

import net.sf.antcontrib.cpptasks.parser.AbstractParser;
import net.sf.antcontrib.cpptasks.parser.AbstractParserState;
import net.sf.antcontrib.cpptasks.parser.LetterState;
import net.sf.antcontrib.cpptasks.parser.WhitespaceOrLetterState;

import java.io.IOException;
import java.io.Reader;
import java.util.Vector;

/**
 * A parser that paths from a borland cfg file
 *
 * @author Curt Arnold
 */
public final class BorlandCfgParser extends AbstractParser {
    private final AbstractParserState newLineState;
    private final Vector<String> path = new Vector<String>();

    /**
     * @param switchChar a character that a switch begins with
     */
    public BorlandCfgParser(char switchChar) {
        //
        //   a quoted path (-I"some path")
        //      doesn't end till a close quote and will be abandoned
        //      if a new line is encountered first
        //
        AbstractParserState quote = new CfgFilenameState(this, new char[]{'"'});
        //
        //    an unquoted path (-Ic:\borland\include)
        //      ends at the first space or new line
        AbstractParserState unquote = new CfgFilenameState(this, new char[]{' ', '\n', '\r'});
        AbstractParserState quoteBranch = new QuoteBranchState(this, quote, unquote);
        AbstractParserState toNextSwitch = new ConsumeToSpaceOrNewLine(this);
        AbstractParserState switchState = new LetterState(this, switchChar, quoteBranch,
                toNextSwitch);
        newLineState = new WhitespaceOrLetterState(this, '-', switchState);
    }

    public void addFilename(String include) {
        path.addElement(include);
    }

    public AbstractParserState getNewLineState() {
        return newLineState;
    }

    public String[] parsePath(Reader reader) throws IOException {
        path.setSize(0);
        super.parse(reader);
        return path.toArray(new String[0]);
    }
}
